JP2017504143A - Selective acoustic storage - Google Patents

Abstract

Computer readable media, controllers and methods for automatically recording acoustic signals are provided. An acoustic signal is received from the acoustic generator by the controller. The frequency of the received acoustic signal is measured by the controller. If the measured frequency is within the predetermined frequency range, the controller starts recording the received acoustic signal. [Selection] Figure 2

Description

[Cross-reference with related applications]
This application claims priority to US Provisional Patent Application No. 61 / 924,044 filed Jan. 6, 2014, which is hereby incorporated by reference in its entirety. It is done.

  The sound storage device can detect the level of the signal input from the musical instrument, and can automatically start recording when the detected signal level is higher than a predetermined threshold.

  However, for example, the sound quality from the musical instrument to be played varies greatly depending on the performer, and the level of the signal output from the musical instrument also varies greatly. Therefore, these acoustic storage devices do not always start recording at the intended timing. For example, the signal level of loud sounds such as notes, chords, and passages played in Fortissimo is high, and the signal level of pianissimo, which is a delicate expression, is low. Therefore, when determining the start of automatic recording based only on the signal level, it is difficult for the storage device to determine the start of automatic recording when a low-level signal based on a delicate expression is input. As a result, the performance may not be recorded.

  In an example embodiment, a method for automatically recording an acoustic signal is provided. An acoustic signal is received from the acoustic generator by the controller. The frequency of the received acoustic signal is determined by the controller. If the measured frequency is within the predetermined frequency range, the controller starts recording the received acoustic signal.

  In another example embodiment, a computer readable medium is provided that stores computer readable instructions that, when executed by a controller, cause the controller to perform an audio signal auto-recording method.

  In yet another example embodiment, a controller is provided. The controller includes, but is not limited to, an input interface, a processor, and a computer readable medium operably coupled to the processor. The input interface is configured to receive an acoustic signal from the acoustic generator. The computer readable medium stores instructions that, when executed by the processor, cause the controller to perform the audio signal automatic recording method.

  Other major features of the present disclosure will become apparent to those skilled in the art when considering the following drawings, detailed description, and claims.

  Exemplary embodiments will be described with reference to the accompanying drawings, in which like elements are designated by like numerals.

1 is a system diagram of an acoustic system according to an exemplary embodiment. FIG. FIG. 2 is a block diagram of the acoustic system of FIG. 1 according to an exemplary embodiment. FIG. 2 is a flow diagram illustrating an example operation performed by the recording device of the sound system of FIG. 1 according to an exemplary embodiment. 2 is a flow diagram illustrating an example operation performed by a recording device of the sound system of FIG. 1 according to another exemplary embodiment. 2 is a flow diagram illustrating an example operation performed by a recording device of the sound system of FIG. 1 according to another exemplary embodiment. 1 is a first side view of a recording device according to an exemplary embodiment. FIG. FIG. 3 is a second side view of a recording device according to an exemplary embodiment. FIG. 2 is a connection diagram of the acoustic system of FIG. 1 according to an exemplary embodiment.

  Referring to FIG. 1, a system diagram of an acoustic system 100 according to an exemplary embodiment is shown. In the exemplary embodiment, sound system 100 may include sound generator 102, controller 104, and sound production device 106. In the exemplary embodiment, sound generator 102 is an electric guitar. The sound generator 102 can include any musical instrument such as an electric guitar, a keyboard, and a microphone. In the exemplary embodiment, sound production device 106 is an amplifier. The sound production device 106 can include any type of amplifier, mixer, speaker, and the like.

  The controller 104 is electrically coupled between the sound generation device 102 and the sound production device 106, receives the sound signal generated by the sound generation device 102, and sends the received sound signal to the sound production device 106. In the exemplary embodiment, controller 104 processes the acoustic signal. Other types of signals, such as video signals, can be processed similarly. The controller 104 can include an input connector 108 and an output connector 110. An example of an input connector is a 1/4 "TS jack such as a male mono jack that can be straight or right. An example of an output connector is a male mono jack that can also be straight or right. One example is a 1/4 "TS jack. The types of input connectors and output connectors are not intended to be limiting and can be adapted for use with individual instruments and amplifiers. For example, in one embodiment, the input connector 108 is a 1/4 ", 1/8" or 3/32 inch size TRS connector. In this embodiment, the TRS connector can be mono or stereo. In another embodiment, input connector 108 is an XLR connector. In one embodiment, input connector 108 and output connector 110 are the same type of connector. In another embodiment, input connector 108 and output connector 110 are different types of connectors. Input connector 108 is electrically coupled to the signal output portion of sound generator 102. The output connector 110 is electrically coupled to the signal input unit of the sound production apparatus 106. A first length of cable 112 may extend between the input connector 108 and the housing 114 of the controller 104. A second length of cable 116 can extend between the output connector 110 and the housing 114 of the controller 104.

  Referring to FIG. 2, a block diagram of an acoustic system 100 according to an exemplary embodiment is shown. The electric guitar 102 a is a first example of the sound generator 102 of the sound system 100. An electric signal based on the string vibration is detected by the pickup of the electric guitar 102 a and is output to the controller 104 via the input connector 108. The microphone 102 b is a second example of the sound generation device 102 of the sound system 100. The amplifier 106 a is a first example of the sound production device 106 of the sound system 100. The controller 104 can include an input interface 200, an output interface 202, a communication interface 204, a computer readable medium 206, a processor 208, a selector 210, and a signal processing application 212. The controller 104 may incorporate fewer, different and additional components. The acoustic system 100 can further include an external computer readable medium 214.

  As will be appreciated by those skilled in the art, the input interface 200 provides an interface for receiving sound from the sound generator 102. As will be appreciated by those skilled in the art, input interface 200 may further provide an interface for receiving information from a user that is input to controller 104. The controller 104 may have one or more input interfaces that use the same or different input interface technologies. Input connector 108 and first length of cable 112 are examples of input interface 200 that provides an interface for receiving sound from sound generator 102. The selector 210 is an example of an input interface 200 that provides an interface for receiving information from a user. The selector 210 may include a keyboard, mouse, touch screen display, trackball, keypad, one or more buttons, one or more switches, etc. to the controller 104 by the user, including but not limited to: Various input techniques may be included that allow the entry of information or the selection shown in the user interface presented on the display. Both the input interface 200 and the output interface 202 can be supported by the same interface. For example, a display with a touch screen allows both user input and presentation of output to the user.

  The output interface 202 provides an interface for outputting a sound signal to the sound production apparatus 102. Output interface 202 may further provide an interface for outputting acoustic signals and / or other information to external computer readable medium 214. The output interface 202 can further provide an interface for outputting information to a user of the controller 104. The controller 104 may have one or more output interfaces that use the same or different input interface technologies. For example, the output interface 202 can interact with a variety of output technologies including, but not limited to, displays, speakers, amplifiers 106a, and the like.

  As will be appreciated by those skilled in the art, communication interface 204 provides an interface for transmitting and receiving data between devices using various protocols, transmission techniques and media. Communication interface 204 may support communication using various transmission media that may be wired and / or wireless. The controller 104 may have one or more communication interfaces that use the same or different input interface technologies. The communication interface 204 can function as another input interface and / or output interface for the controller 104. Examples of the communication interface include an Ethernet (registered trademark) connector, a universal serial bus connector (USB), a mini USB connector, a micro USB connector, and a high-definition multimedia interface connector.

  As will be appreciated by one skilled in the art, the computer readable medium 206 is an electronic information holding portion or an electronic information storage device so that the processor 208 can access the information. The computer readable medium 206 includes, but is not limited to, a magnetic storage device (eg, hard disk, floppy disk, magnetic strip, etc.), an optical disk (eg, a compact disk (CD), a digital versatile disk (DVD)). Etc.), any type of random access memory (RAM), any type of read only memory (ROM), any type of flash memory, etc., such as smart cards, flash memory devices, etc. The controller 104 may have one or more computer readable media that use the same or different storage media technologies. The controller 104 can also have one or more drives that support reading of storage media such as CDs, DVDs, flash memory devices, and the like. The computer readable medium 206 is configured to store recording data generated from a signal input from the sound generation device 102 based on control by the controller 104. The controller 104 can control the output of the recording data stored in the computer readable medium 206 to the sound production apparatus 106.

  External computer readable medium 214 may include a secure digital memory card, hard disk, flash memory card, CD, DVD, and the like. The external computer readable medium 214 stores recording data generated from a signal input from the sound generation device 102 based on control by the controller 104 and / or stores recording data stored in the external computer readable medium 214. By outputting to the controller 104, it is comprised so that it may output to the sound production apparatus 106. The external computer readable medium 214 can be removed from the housing 114 of the controller 104.

  As will be appreciated by those skilled in the art, processor 208 executes instructions. These instructions can be executed by a dedicated computer, logic circuit or hardware circuit. The processor 208 can be implemented in hardware, firmware, or any combination of these methods. The term “execution” refers to the execution process of an application or the execution of an operation invoked by an instruction. The instructions can be written using one or more programming languages, script languages, assembly languages, and the like. The processor 208 executes the instruction, i.e., executes / controls the operation invoked by this instruction. The processor 208 is operatively coupled to the input interface 200, the output interface 202, the communication interface 204, and the computer readable medium 206 for receiving, transmitting and processing information. The processor 208 can read the instruction set from persistent storage and copy the instructions in an executable form to temporary storage, typically in the form of some RAM. The controller 104 can include multiple processors that use the same or different processing techniques.

  The signal processing application 212 performs operations related to automatically controlling the recording of the acoustic signal received from the acoustic generator 102. Some or all of the operations described herein may be embodied in the signal processing application 212. These operations can be implemented in hardware, firmware, software, or any combination of these methods. With reference to the example embodiment of FIG. 2, signal processing application 212 is stored on computer readable medium 206 and accessible by processor 208 for executing instructions that embody the operation of signal processing application 212 (computer readable instructions). And / or implemented in software) (consisting of computer-executable instructions). The signal processing application 212 can be written using one or more programming languages, assembly languages, script languages, and the like.

  The controller 104 may include an apparatus that processes an input acoustic signal to change sound quality, an amplifier simulator that simulates a guitar amplifier, and the like.

  An operation example related to the signal processing application 212 will be described with reference to FIG. Depending on the embodiment, more, fewer, or different operations may be performed. Although some of the operational flows are shown in order, the various operations may be performed in various iterations, simultaneously, and / or in an order other than that shown.

  In operation 300, a signal is received from the sound generator 102 via the input interface 200 of the controller 104. In act 302, the frequency of the received signal is measured. In operation 304, it is determined whether or not the measured frequency is within a predetermined frequency range, that is, whether or not the input signal corresponds to a signal output from the sound generator 102 such as the electric guitar 102a during performance. To do. For example, it may be desirable to record after playing the electric guitar 102a. In general, electric guitars produce signals in the frequency range of 80-1300 hertz. The predetermined frequency range can be based on the frequency range of the acoustic signal generated by the electric guitar 102a or what portion of the sound produced by the acoustic system 100 is desired to be recorded. As a result, the controller 104 can determine whether or not the musician has started playing the electric guitar 102a. The predetermined frequency range can be stored on the computer readable medium 206 after input by the user, such as through the user interface 200, or after preprogramming of frequency values such as minimum and maximum frequencies.

  The computer readable medium 206 can store a plurality of frequency ranges corresponding to a plurality of musical instruments to be recorded. In this case, the controller 104 may include a selector 210 that selects a desired frequency range based on an instrument played by the user from among a plurality of frequency ranges stored in the memory. Using the frequency range selected by the selector 210, the start or end of recording can be determined.

  If the measured frequency range is not within the predetermined frequency range, the process proceeds to operation 300 and continues to monitor the received signal. If the measured frequency range is within the predetermined frequency range, processing proceeds to operation 306. In operation 306, the controller 104 initiates recording and storage of the recording data generated from the input signal to the computer readable medium 206 and / or the external computer readable medium 214. Various different formats, including WAV, MP3, DSD, etc., can be used for storing recorded data. This storage format can be stored on the computer readable medium 206 after selection or input by the user via the input interface 200 or after pre-programming a predetermined format, for example. The signal can be a stereo signal or a monaural signal.

  In act 308, a second signal is received from the sound generator 102 via the input interface 200 of the controller 104 after the start of recording. In operation 310, a second frequency of the received second signal is measured. In act 312, it is determined whether the measured second frequency is within a predetermined frequency range. For example, the controller 104 determines whether the performer continues to play the electric guitar 102a. If the measured second frequency is not within the predetermined frequency range, the process proceeds to operation 316. If the measured second frequency is within the predetermined frequency range, processing proceeds to operation 314. In operation 314, the controller 104 continues to record and store the recording data generated from the input signal on the computer readable medium 206 and / or the external computer readable medium 214. In operation 314, the length of time after which the measured second frequency no longer exists within the predetermined frequency range is reset to zero. Thereafter, the process proceeds to operation 308 where the signal from the sound generator 102 is received and processed.

  In operation 316, it is determined whether the length of time since the measured second frequency is no longer within the predetermined frequency range exceeds the first time threshold. In the exemplary embodiment, the first time threshold is 2 seconds. Of course, the user may use other time lengths including zero and select as input using the selector 210 of the input interface 200. If the length of time since the measured second frequency is no longer within the predetermined frequency range exceeds the first time threshold, processing proceeds to operation 318. If the measured length of time since the second frequency is no longer within the predetermined frequency range does not exceed the first time threshold, the process proceeds to operation 308 and receives a signal from the sound generator 102. And continue processing. In operation 318, recording and storage are stopped.

  In the exemplary embodiment, controller 104 temporarily records the signal received from sound generator 102 on computer readable medium 206. When the external computer readable medium 214 is turned on, for example in operation 304, if the measured frequency is within a predetermined frequency range, the controller 104 is input several seconds ago to the computer readable medium 206. The recording data is generated from the temporarily stored signal. As a result, the controller 104 starts recording the input signal several seconds before the timing determined in the operation 304, starts recording, and stores the recorded data in the external computer readable medium 214 from the signal start position. In the exemplary embodiment, controller 104 begins to store pre-recorded data from two seconds ago.

  As a result of this processing, the controller 104 can automatically control sound recording only when the frequency of the input signal is within a predetermined frequency range. The computer readable medium 206 and / or the external computer readable medium 214 store a frequency range (equal to a scale) of the signal that the sound generator 102 can generate during a performance. As a result, the controller 104 can determine whether the signal input from the sound generator 102 is a signal to be recorded and / or output during performance. As a result, noise picked up by the pickup of the electric guitar 102a or the first length cable 112 can be distinguished from the signal output from the electric guitar 102a during performance. Recording can be started only when the input signal is output from the electric guitar 102a during performance. Therefore, the controller 104 can start automatic recording at a time suitable for reliable recording, and can stop recording at an appropriate time such as when the electric guitar 102a is not being played. The controller 104 converts the recorded data into a signal in order to reproduce the sound based on the recorded data, and outputs the converted signal to the sound production apparatus 106.

  With reference to FIGS. 4a and 4b, an example operation associated with the signal processing application 212 in accordance with the second exemplary embodiment will be described. Depending on the embodiment, more, fewer, or different operations may be performed. Although some of the operational flows are shown in order, the various operations may be performed in various iterations, simultaneously, and / or in an order other than that shown.

  In operation 400, a signal is received from the sound generator 102 via the input interface 200 of the controller 104. In operation 402, the signal level of the received signal is measured. In act 404, it is determined whether the measured signal level is above a first predetermined threshold level. In the exemplary embodiment, the first predetermined threshold level is −24 decibels (−24 dBFS) relative to full scale. Of course, the user can also use other threshold levels to select as input using the selector 210 of the input interface 200. In an exemplary embodiment, it can be determined whether the measured signal level is greater than or equal to a first predetermined threshold level. If the measured signal level is less than or equal to the first predetermined threshold level, processing proceeds to operation 406. If the measured signal level is above the first predetermined threshold level, processing proceeds to operation 410.

  In act 406, the frequency of the received signal is measured. In operation 408, it is determined whether or not the measured frequency is within a predetermined frequency range, that is, whether or not the input signal corresponds to a signal output from the sound generator 102 such as the electric guitar 102a during performance. . If the measured frequency is not within the predetermined frequency range, the process proceeds to operation 400 and continues to monitor the received signal. If the measured frequency is within the predetermined frequency range, processing proceeds to operation 410. In operation 410, the controller 104 begins to record and store the recording data generated from the input signal on the computer readable medium 206 and / or the external computer readable medium 214.

  In act 412, a second signal is received from the sound generator 102 via the input interface 200 of the controller 104 after the start of recording. In act 414, a second signal level of the received signal is measured. In act 416, it is determined whether the measured second signal level is below a second predetermined threshold level. In the exemplary embodiment, the second predetermined threshold level is -48 dBFS. Of course, the user can use other threshold levels to select as input using the selector 210 of the input interface 200.

  In an exemplary embodiment, it can be determined whether the measured second signal level is less than or equal to a second predetermined threshold level. In an exemplary embodiment, the second predetermined threshold level is lower than the first predetermined threshold level. If the measured second signal level is not below the second predetermined threshold level, processing proceeds to operation 422. If the measured second signal level is below the second predetermined threshold level, processing proceeds to operation 418.

  In act 418, it is determined whether the length of time after the second signal level falls below the second predetermined threshold level exceeds the second time threshold. In the exemplary embodiment, the second time threshold is 2 seconds. Of course, the user may use other time lengths including zero and select as input using the selector 210 of the input interface 200. If the length of time since the measured second signal level falls below the second predetermined threshold level exceeds the second time threshold, processing proceeds to operation 420. If the length of time since the measured second signal level falls below the second predetermined threshold level does not exceed the second time threshold, processing proceeds to operation 422. In operation 420, recording and storage are stopped.

  In act 422, a second frequency of the received second signal is measured. In operation 422, the length of time after which the second signal level falls below the second predetermined threshold level is reset to zero.

  In act 424, it is determined whether the measured second frequency is within a predetermined frequency range. If the measured second frequency is not within the predetermined frequency range, processing proceeds to operation 428. If the measured frequency is within the predetermined frequency range, processing proceeds to operation 426. In operation 426, the controller 104 continues to record and store the recording data generated from the input signal on the computer readable medium 206 and / or the external computer readable medium 214. In operation 426, the length of time after which the measured second frequency no longer exists within the predetermined frequency range and the length of time after the second signal level falls below the second predetermined threshold level is zero. Reset to. Thereafter, the process proceeds to operation 412 where the signal from the sound generator 102 is received and processed.

  In act 428, it is determined whether the length of time since the measured second frequency is no longer within the predetermined frequency range exceeds the first time threshold. If the length of time since the measured second frequency is no longer within the predetermined frequency range exceeds the first time threshold, the process proceeds to operation 420. If the length of time since the measured second frequency no longer exists within the predetermined frequency range does not exceed the first time threshold, the process proceeds to operation 426 and the recording data generated from the input signal. Continue to be recorded and stored on the computer readable medium 206 and / or the external computer readable medium 214. The first time threshold and the second time threshold can have the same or different values.

  As a result of this processing, when a large input signal is detected, the controller 104 starts automatic recording in consideration of only the signal level. When a small input signal is detected, the controller 104 automatically performs recording only when the frequency of the input signal is within a predetermined frequency range. As a result, when the performer is clearly playing the musical instrument, the controller 104 starts automatic recording considering only the signal level. During the delicate performance of the pianissimo by the performer, or if it is not possible to determine whether the performer is playing an instrument, the controller 104 determines whether the frequency of the input signal is within a predetermined frequency range. If the level of the signal input during recording is less than or equal to the second threshold, the controller 104 stops recording, and therefore if the level of the input signal is at a level that cannot be perceived by the human ear, or is hardly perceptible. Can be stopped. When the volume is gradually lowered and the performance is finished, the second predetermined threshold level is set to the first predetermined threshold level so that the recording can be prevented from suddenly stopping before the volume is completely reduced. Is set to a lower level.

  The processing related to the signal level and the processing related to the signal frequency can be executed in reverse order.

  Referring to FIG. 5, a side view of the controller 104 according to an exemplary embodiment is shown. The controller 104 can include a first selector 500, a first output interface 502 and a second output interface 504. The first selector 500, the first output interface 502 and the second output interface 504 are attached to the housing 114. The first selector 500 is an illustration of a selector 210 that allows the user to turn the controller 104 on and off. First output interface 502 and second output interface 504 are examples of output interface 202 that interacts with external computer-readable medium 214.

  Referring to FIG. 6, a second side view of the controller 104 according to an exemplary embodiment is shown. The controller 104 can include a second selector 600 and a third output interface 602 attached to the housing 114. The second selector 600 is another example of the selector 210 that allows the user to switch between using the operation of FIG. 3 and / or FIG. 4 and continuous recording without applying the operation of FIG. 3 or FIG. Third output interface 602 is another example of output interface 202 that interacts with external computer readable medium 214. For example, the third output interface 602 can include an SD card slot into which an SD card is inserted.

  Referring to FIG. 7, a connection diagram of an acoustic system 100 according to an exemplary embodiment is shown. The first length of cable 112 interacts with codec 700 to receive a signal from, for example, electric guitar 102a. The second length of cable 116 interacts with the first length of cable 112 to receive a signal, for example, transmits the signal to amplifier 106a, regardless of the operation of controller 104. The codec 700 is electrically coupled to send the received signal to the digital signal processor 702. The codec 700 converts the received signal into a digital signal and encodes the signal so that it can be stored. The codec 700 can also decode the recorded signal so that it can be played back. In the exemplary embodiment, codec 700 is CS42L52 from Circus Logic. In the exemplary embodiment, when the controller 104 is off, the signal received from the sound generator 102 is transmitted to the sound production device 106 via the first length cable 112 and the second length cable 116. Sent directly.

  The digital signal processor 702 is electrically coupled with the first selector 500, the second selector 600, the first output interface 502, the second output interface 504, and the third output interface 602. In the exemplary embodiment, digital signal processor 702 includes computer readable medium 206, processor 208, and signal processing application 212 stored on computer readable medium 206. In the exemplary embodiment, digital signal processor 702 is an ADSP BF514 from Analog Devices.

  As used herein, the term “illustrative” is intended to be an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs. Further, in the present disclosure, unless otherwise specified, “one (English indefinite article)” means “one or more”. Further, the use of “and” or “or” is intended to include “and / or” unless expressly stated otherwise. Exemplary embodiments include methods, apparatus using standard programming and / or engineering techniques that result in software, firmware, hardware, or any combination thereof that controls a computer to implement the disclosed embodiments. Or it can be implemented as an article of manufacture.

  The foregoing description of the exemplary embodiments of the presently disclosed subject matter has been presented for purposes of illustration and description. The above description is not intended to be exhaustive or to limit the subject matter of the disclosure to the precise forms disclosed, and modifications and variations are possible in light of the above teaching. Alternatively, modifications and variations can be obtained by practicing the subject matter of this disclosure. The embodiments are provided to illustrate the principles of the presently disclosed subject matter and to enable those skilled in the art to utilize the presently disclosed subject matter in various embodiments with various modifications appropriate to the particular application under consideration. It has been chosen and described as a practical application of the subject matter of the present disclosure. The scope of the present disclosure subject matter is to be determined by the claims appended hereto and their equivalents.

100 acoustic system 102a electric guitar 102b microphone 104 controller 106a amplifier 200 input interface 202 output interface 204 communication interface 206 computer readable medium 208 processor 210 selector 212 signal processing application 214 external CRM

Claims (20)

A computer readable medium having stored thereon computer readable instructions, said computer readable instructions being executed by a controller when the controller
Receiving an acoustic signal from the acoustic generator;
Measuring the frequency of the received acoustic signal;
Starting the recording of the received acoustic signal if the measured frequency is within a predetermined frequency range;
To execute,
A computer-readable medium characterized by the above. The computer readable instructions are sent to the controller,
Measuring the level of the received acoustic signal before measuring the frequency;
Starting the recording of the received acoustic signal before measuring the frequency if the measured level is above a predetermined threshold and the recording has not yet started;
To run further,
The computer-readable medium of claim 1. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second level of the received second acoustic signal;
Stopping the recording of the received acoustic signal if the measured second level is below a second predetermined threshold;
To run further,
The computer-readable medium according to claim 1 or 2. The recording is stopped only when the length of time since the measured second level falls below the second predetermined threshold is exceeded.
The computer-readable medium according to claim 1. The second predetermined threshold is lower than the predetermined threshold;
The computer readable medium according to claim 1. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second frequency of the received second acoustic signal;
Stopping the recording of the received second acoustic signal if the measured second frequency is not within the predetermined frequency range;
To run further,
The computer-readable medium according to claim 1 or 2. The computer readable instructions are sent to the controller,
Measuring a second level of the received second acoustic signal;
Stopping the recording of the received acoustic signal if the measured second level is below a second predetermined threshold;
To run further,
The computer-readable medium according to claim 5 or 6. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second frequency of the received second acoustic signal;
Stopping the recording of the received second acoustic signal if the measured second frequency is not within the predetermined frequency range;
To run further,
The computer-readable medium of claim 1. The recording is stopped only when the time length from when the measured second frequency is no longer within the predetermined frequency range is exceeded.
The computer readable medium of claim 8. A controller,
An input interface configured to receive an acoustic signal from the acoustic generator;
A processor;
A computer readable medium storing computer readable instructions operatively coupled to the processor;
The computer readable instructions when executed by the processor, to the controller,
Measuring the frequency of the received acoustic signal;
Starting the recording of the received acoustic signal if the measured frequency is within a predetermined frequency range;
To execute,
A controller characterized by that. The computer readable instructions are sent to the controller,
Measuring the level of the received acoustic signal before measuring the frequency;
Starting the recording of the received acoustic signal before measuring the frequency if the measured level is above a predetermined threshold and the recording has not yet started;
To run further,
The controller according to claim 10. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second level of the received second acoustic signal;
Stopping the recording of the received acoustic signal if the measured second level is below a second predetermined threshold;
To run further,
The controller according to claim 11. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second frequency of the received second acoustic signal;
Stopping the recording of the received second acoustic signal if the measured second frequency is not within the predetermined frequency range;
To run further,
The controller according to claim 12. The computer readable instructions are sent to the controller,
Measuring a second level of the received second acoustic signal;
Stopping the recording of the received acoustic signal if the measured second level is below a second predetermined threshold;
To run further,
The controller according to claim 13. The computer readable instructions are sent to the controller,
Receiving a second acoustic signal after recording the received acoustic signal;
Measuring a second frequency of the received second acoustic signal;
Stopping the recording of the received second acoustic signal if the measured second frequency is not within the predetermined frequency range;
To run further,
The controller according to claim 10. An output interface configured to send the received acoustic signal to a sound production device;
The controller according to claim 10. An output interface configured to output the received acoustic signal for recording on an external computer readable medium;
The controller according to claim 10. The received acoustic signal recorded on the external computer readable medium is recorded on the external computer readable medium before it is determined that the frequency is within the predetermined frequency range.
The controller according to claim 17. A codec electrically coupled between the input interface and the processor, the codec configured to convert the received acoustic signal from an analog signal to a digital signal, and the recorded acoustic signal; Is a digital signal,
The controller according to claim 10. An audio signal automatic recording method,
Receiving an acoustic signal from the acoustic generator by the controller;
Measuring the frequency of the received acoustic signal by the controller;
Starting the recording of the received acoustic signal under control of the controller if the measured frequency is within a predetermined frequency range;
A method comprising the steps of:

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